Mr. Packham: The baby okapi was born on 23rd November 1963. It was found at 8.30 in the morning and appeared to be a very strong and healthy baby. During the first day it was seen to feed ten times from the mother, the feeding times varying between 4. and 7 minutes. For the first two days the baby was extremely active in the morning, Up to about lunch time; it appeared to rest during the aftern...

In this paper we report on our TREC-8 SDR system, which combines an adapted version of the LIMSI 1998 Hub-4E transcription system for speech recognition with an IR system based on the Okapi term weighting function. Experimental results are given in terms of word error rate and average precision for both the SDR’98 and SDR’99 data sets. In addition to the Okapi approach, we also investiged a Mar...

Use of XML offers a structured approach for representing information while maintaining separation of form and content. XML information retrieval is different from standard text retrieval in two aspects: the XML structure may be of interest as part of the query; and the information does not have to be text. In this paper, we describe an investigation of approaches to retrieve text and images fro...

In this paper we propose an hybrid system of Arabic words disambiguation. To achieve this goal we use the methods employed in the domain of information retrieval: Latent semantic analysis, Harman, Croft, Okapi, combined to the lesk algorithm. These methods are used to estimate the most relevant sense of the ambiguous word. This estimation is based on the calculation of the proximity between the...

The paper reports on the experiment conducted by the University of Sheffield in the Interactive Track of TREC-9 based on the Okapi probabilistic ranking system. A failure analysis of results was undertaken to correlate search outcomes with query characteristics. A detailed comparison of Sheffield results with the aggregate for the track reveals that the time element, topic type, and searcher ch...

York University participated in the legal track this year. For this track, we developed an Okapi-based Legal Search Engine (LSE) v1.0. Our experiments mainly focused on evaluating the effect of a probabilistic text retrieval model on the legal domain. In order to address the special problems in legal text retrieval, new automatic feedback methods and term weighting methods are proposed and tested.

spodoptera exigua (hübner) was studied in laboratory (25±1ºc, 60±5% rh, and 16:8 l:d h) exploring the antibiotic effects of 10 canola cultivars (sarigol, slm046, hayula420, rgs003, opera, okapi, licord, modena, zarfam and talaye) on its demographic parameters. the age-stage, two-sex and the traditional female age-specific life tables were constructed by using the demographic data. the larval pe...

In this paper, we present some ideas about possible directions of a new interpretation of the Okapi BM25 ranking formula. In particular, we have focused on a full bayesian approach for deriving a smoothed formula that takes into account a-priori knowledge on the probability of terms. In fact, most of the efforts in improving the BM25 were done in capturing the language model (frequencies, lengt...

In this paper, we present the initial findings about a possible geometric interpretation of the BM25 model and a comparison of the BM25 with the Binary Independence Model (BIM) on a two-dimensional space. A Web application was developed in R to show an example of this geometric view on a standard TREC collection. The application is accessible at the following link: http://gmdn.shinyapps.io/shin...